CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 64,541	$ 45,160
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation	96,006	90,680
Net amortization of debt discounts, premiums and deferred financing fees	913	1,751
Straight line rental income	(19,798)	(17,991)
Amortization of acquired real estate leases	33,060	29,422
Other amortization	9,806	9,815
Loss on asset impairment	8,535
Loss on early extinguishment of debt	60,027	1,675
Equity in earnings of investees	(4,421)	(5,787)
Gain on sale of equity investment	(66,293)
Distributions of earnings from investees	4,111	5,592
Gain on sale of properties	(4,955)	(350)
Change in assets and liabilities:
Restricted cash	966	(4,339)
Rents receivable and other assets	(22,449)	(17,943)
Accounts payable and accrued expenses	(15,737)	2,429
Rent collected in advance	(7,730)	(5,493)
Security deposits	122	713
Due to related persons	(3)	3,369
Cash provided by operating activities	136,701	138,703
CASH FLOWS FROM INVESTING ACTIVITIES:
Real estate acquisitions	(165,110)	(253,710)
Real estate improvements	(53,908)	(50,636)
Principal payments received from direct financing lease	3,444	3,283
Proceeds from sale of properties, net	33,863	338
Proceeds from sale of equity investment, net	239,576
Distributions in excess of earnings from investees	168	2,766
Investment in Affiliates Insurance Company		(5,335)
Increase in restricted cash	(2,349)	(2,121)
Cash provided by (used in) investing activities	55,684	(305,415)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common shares, net	626,809	180,814
Repurchase and retirement of outstanding debt securities	(728,021)
Proceeds from borrowings	936,000	444,500
Payments on borrowings	(962,207)	(395,250)
Deferred financing fees	(1,200)	(6,049)
Distributions to common shareholders	(50,527)	(83,722)
Distributions to preferred shareholders	(22,302)	(27,466)
Distributions to noncontrolling interest in consolidated subsidiary	(14,863)
Cash (used in) provided by financing activities	(216,311)	112,827
Effect of exchange rate changes on cash	(773)	(73)
Decrease in cash and cash equivalents	(24,699)	(53,958)
Cash and cash equivalents at beginning of period	102,219	192,763
Cash and cash equivalents at end of period	77,520	138,805
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid	109,108	99,227
Taxes paid	1,134	536
NON-CASH INVESTING ACTIVITIES:
Real estate acquisitions		(176,884)
Investment in real estate mortgages receivable	(7,688)	(1,419)
NON-CASH FINANCING ACTIVITIES:
Issuance of common shares	244	187
Assumption of mortgage notes payable		$ 176,884